【推荐1】We should take effective measures to prevent the river from ____ (pollute). (所给词的适当形式填空)

【推荐2】Proper measure must be taken to prevent the river nearby from ________ (pollute).

【推荐3】Large amounts of water ________(pollute) in the past five years. (所给词的适当形式填空)

【推荐1】It ________ (consider) politer to have brief eye contact, especially between people of different social status (like a student and a teacher, or a child and his elder relatives). For example, if a Japanese woman avoids looking someone in the eye, she is not showing a lack of interest nor is she showing a lack of confidence.(所给词的适当形式填空）

【推荐2】根据课文内容填词，注意必要的地方进行单词变形。
1. Today’s festivals have many origins: some are __________(religion), some seasonal, and some for special people or events.
2. In the USA, Columbus Day is in memory of the __________(arrive) of Christopher Columbus in the New World.
3. Well, he was not going to hold his __________ for her to apologize.（根据句意拼写单词）
4. It was __________ that the manager of the coffee shop was waiting for Li Fang to leave.（根据句意拼写单词）
5. The __________(host), a very thin lady, came forward.
6. He could not have Yong Hui getting away __________ telling people lies.
7. I found your menu so __________(limit) that I stopped worrying and started advertising the benefits of my food.
8. Perhaps we ought to __________(结合) our ideas and provide a balanced menu with food full of energy and fibre.
9. At this moment, they see a penniless young man __________(wander) on the pavement outside their house.
10. The fact is __________ I earned my passage by working as an unpaid hand, which accounts for my appearance.
11. That one is __________(reserve). This way, please.
12. Well, we’ll have to take __________ chance.
13. As __________ the bill, sir, please forget it.
14. The continued presence of water allowed the earth to dissolve __________(harm) gases and acids into the oceans and seas.
15. They laid eggs too and __________(exist) on the earth for more than 140 million years.
16. Walking does need a bit of practice __________(既然，因为) gravity has changed.
17. People say it is Canada’s most beautiful city, __________(surround) by mountains and the Pacific ocean.
18. That after __________(在……上) the train, the cousins settled down in their seats.
19. There was frost on the ground, __________(confirm) that fall had arrived in Canada.
20. It is __________(approximate) four hundred kilometers northeast of Toronto.

【推荐3】The heart ___________________(compare) to a pump. （所给词的适当形式填空）